Belfast, Northern Ireland Climate & Temperature

Belfast, Northern Ireland has a marine west coast climate that is mild with no dry season, warm summers. Heavy precipitation occurs during mild winters which are dominated by mid-latitude cyclones. Seasonality is moderate (Köppen-Geiger classification: Cfb).

According to the Holdridge life zones system of bioclimatic classification Belfast, Northern Ireland is situated in or near the cool temperate moist forest biome.

The mean temperature is 9.1 degrees Celsius (48.4 degrees Fahrenheit). See the temperatures page for a monthly breakdown and the fixed scale graph.

Average monthly temperatures vary by 10.5 °C (18.9°F). This indicates that the continentality type is hyperoceanic, subtype barely hyperoceanic.

In the winter time records indicate temperatures by day reach 6.7°C (44°F) on average falling to 2.3°C (36.2°F) overnight.

In spring time temperatures climb reaching 12°C (53.6°F) generally in the afternoon with overnight lows of 4.3°C (39.8°F).

During summer average high temperatures are 18°C (64.4°F) and average low temperatures are 10.3°C (50.6°F).

Come autumn/ fall temperatures decrease achieving average highs of 12.7°C (54.8°F) during the day and lows of 6.7°C (44°F) generally shortly after sunrise.